Spotted by website Pink Tentacle, here is some grayish-bluish "zombie meat" beef jerky which claims to be aged to dead perfection in the graveyard. It also claims to be "juicy". (The fine prints points out that this is, yes, beef jerky.) Not sure how widely this is being sold in Japan, but here you go:

The packaging also asks if you've ever seen blue meat like this. I haven't, and I think I'll pass!